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(11) | EP 0 208 493 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Nibbling tool |
| (57) The invention concerns a nibbling tool for cutting sheet material having a body (12)
in which a rotary shaft (14) is mounted for rotation by an external drive means. The
rotary shaft is coupled to a punch (33) by coupling means (41 - 45) which convert
the rotary movement to a reciprocal movement of the punch. The punch is guided in
a die (27) with the punch and die having co-operating cutting edges. The die (27)
has a circular sectioned shank (28) located as a good sliding fit in the body (12)
and retained by a screw (30) projecting into a recess (29) in the shank (28). When
the screw (30) is released the die can be rotated to change the cutting direction
or removed and replaced without opening up the body or taking out other parts. With
the die removed the punch can be removed easily. The punch is guided both at its upper
end in a bore (25) In handle (23) and at its lower end by its head (38) located in
a bore in a lower die portion (53) connected to the main die portion (28) by a web
(55). The corners (55A) connecting the web with the main die portion and/or lower
die portion are radiused or chamfered. |